Astonishing collection of helmets, scientific instruments, and medical models.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Nondescript elevator doors open to reveal a stunning, surreal world.

Would you spend the night in Japan's deepest train station?

America's only nuclear missile silo open to the public.

Catch a ride through the Pennsylvania countryside on this historic narrow-gauge railroad.

A beautiful, historic location open to the public.

A disconnected rotary phone for "calling" lost loved ones offered a unique way of dealing with grief in disaster-stricken Japan.

This magnificent Japanese garden provides a moment of Zen in rural Vermont.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

This overlooked museum houses an amazing collection of rare, antique typewriters.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

This house's itty bitty size means no humans allowed.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

Sleep in a climate-controlled plastic bubble for the night.